Impementing Vertical Scroll with horizontal swipe in Android

Question

You need to add the following code into your Activity. With this code, the Activity gives the GestureDetector a chance to see the touch event.

@Override
public boolean dispatchTouchEvent(MotionEvent ev){
    super.dispatchTouchEvent(ev);
    return gDetector.onTouchEvent(ev);
}

EDIT: You said you wanted an example of this working with LinearLayout.

package com.brianattwell.app;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.Menu;
import android.view.MotionEvent;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnGestureListener {
    GestureDetector gDetector;TextView tv;
    private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 250;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;
    private static final int SWIPE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gDetector = new GestureDetector(this);
        tv=(TextView)findViewById(R.id.tv);

    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev){
        super.dispatchTouchEvent(ev);
        return gDetector.onTouchEvent(ev);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        //getMenuInflater().inflate(R.menu., menu);
        return true;
    }

    @Override
    public boolean onDown(MotionEvent arg0) {
        // TODO Auto-generated method stub
        Log.d("onDown","In OnDown");
        return true;

    }

    public void rightToLeft() {

        //tv.setText("There are subclasses of LayoutParams for different subclasses of ViewGroup. For example, AbsoluteLayout has its own subclass of LayoutParams which adds an X and Y value.");
        tv.setText("ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssALGIERS (Reuters) - Algerian President Abdelaziz Bouteflika, who suffered a stroke last year, has been in a Paris hospital since Monday for a long-planned check-up and he is making steady progress, the state news agency APS said on Tuesday.Algerians vote for a new president in April. Bouteflika, 76, has yet to announce whether he will run again after more than 10 years at the helm of the major North African oil producer.To complete his health assessment, started in Algiers, and under a routine medical control ... planned since June 2013, the President of the Republic Abdelaziz Bouteflika is staying at Val-de-Grace hospital, it said. The president's health is improving certainly and progressively.APS, citing a presidential statement, said Bouteflika would remain at the hospital until Friday.A veteran of Algeria's independence war against France, Bouteflika suffered a stroke in early 2013, forcing him to be rushed to hospital in France. He returned to Algeria in July to convalesce and has made only a few public appearances recentlsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssALGIERS (Reuters) - Algerian President Abdelaziz Bouteflika, who suffered a stroke last year, has been in a Paris hospital since Monday for a long-planned check-up and he is making steady progress, the state news agency APS said on Tuesday.Algerians vote for a new president in April. Bouteflika, 76, has yet to announce whether he will run again after more than 10 years at the helm of the major North African oil producer.To complete his health assessment, started in Algiers, and under a routine medical control ... planned since June 2013, the President of the Republic Abdelaziz Bouteflika is staying at Val-de-Grace hospital, it said. The president's health is improving certainly and progressively.APS, citing a presidential statement, said Bouteflika would remain at the hospital until Friday.A veteran of Algeria's independence war against France, Bouteflika suffered a stroke in early 2013, forcing him to be rushed to hospital in France. He returned to Algeria in July to convalesce and has made only a few public appearances recentlsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssALGIERS (Reuters) - Algerian President Abdelaziz Bouteflika, who suffered a stroke last year, has been in a Paris hospital since Monday for a long-planned check-up and he is making steady progress, the state news agency APS said on Tuesday.Algerians vote for a new president in April. Bouteflika, 76, has yet to announce whether he will run again after more than 10 years at the helm of the major North African oil producer.To complete his health assessment, started in Algiers, and under a routine medical control ... planned since June 2013, the President of the Republic Abdelaziz Bouteflika is staying at Val-de-Grace hospital, it said. The president's health is improving certainly and progressively.APS, citing a presidential statement, said Bouteflika would remain at the hospital until Friday.A veteran of Algeria's independence war against France, Bouteflika suffered a stroke in early 2013, forcing him to be rushed to hospital in France. He returned to Algeria in July to convalesce and has made only a few public appearances recently.");
    }
    public void lefttoRight() {
        tv.setText("leftToRight LayoutParams are used by views to tell their parents how they want to be laid out. See ViewGroup Layout Attributes for a list of all child view attributes that this class supportsght LayoutParams are used by views to tell their parents how they want to be laid out. See ViewGroup Layout Attributes for a list of all child view attributes that this class supportsght LayoutParams are used by views to tell their parents how they want to be laid out. See ViewGroup Layout Attributes for a list of all child view attributes that this class supports. ");
    }

    @Override
    public boolean onFling(MotionEvent start, MotionEvent finish, float velocityX,
                           float velocityY) {
        // TODO Auto-generated method stub
        //TextView t=(TextView)findViewById(R.id.tv);
        /*if(start.getRawX() < finish.getRawX())
        {
            Log.d("onFling","in inFling");
        }
        else if(start.getRawX()>finish.getRawX())
        {
            Log.d("onFLing","in onFling");
        }*/
        if (Math.abs(start.getY() - finish.getY()) > SWIPE_MAX_OFF_PATH)
            return false;
        // right to left swipe

        if(start.getX() - finish.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

            lefttoRight();

        }
        else if (finish.getX() - start.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
            rightToLeft();
        }
        return true;
    }


    @Override
    public boolean onTouchEvent(MotionEvent me) {
        return gDetector.onTouchEvent(me);
    }

    @Override
    public void onLongPress(MotionEvent arg0) {
        // TODO Auto-generated method stub
        Log.d("onLongPress","in onlongpress");
    }



    @Override
    public void onShowPress(MotionEvent arg0) {
        // TODO Auto-generated method stub
        Log.d("onShowPress","in onShowPress");

    }

    @Override
    public boolean onSingleTapUp(MotionEvent arg0) {
        // TODO Auto-generated method stub
        Log.d("onSingleTapup","in onsingletapup");
        return true;
    }

    @Override
    public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
                            float arg3) {
        // TODO Auto-generated method stub
        return false;
    }

}

Layout file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Gestures" >



    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

            <TextView
                android:id="@+id/tv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/hello_world" />

    </ScrollView>

</LinearLayout>